US2928061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ballast tube
Assignee: Tung Sol Electric Inc
•
Filing: 1956-10-18
•
Granted: 1960-03-08
•
Expires: 1976-10-18
Abstract
No abstract record available.
Inventors
- 👤 Benjamin F Steiger
- 👤 Yarmovsky Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:49
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
82 words
A BALLAST TUBE WHICH PASSES THROUGH CURRENT OR A RESTRICTED RANGE OF APPLIED VOLTAGE COMPRISING: AN ENVELOPE, AN IRON WIRE MOUNTED WITHIN THE ENVELOPE IN AN ATMOSPHERE OF HYDROGEN AT A PRESSURE OF MORE THAN 10 MILLIMETERS OF MERCURY, SAID IRON WIRE COVERED WITH A FILM OF GOLD, THE THICKNESS OF THE GOLD FILM BEING ABOUT SUCH THAT THE WEIGHT OF THE WIRE IS INCREASED ABOUT SIX PERCENT, AND LEAD-IN CONDUCTORS CONNECTED TO THE IRON WIRE FOR CONNECTION TO AN EXTERNAL CICRUIT.
References Cited (Backward Citations)
US743028A
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US1083070A
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US1101821A
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US1804344A
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US1945726A
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US2047351A
Cited
US2092133A
Cited
US2154862A
Cited
US2530686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |